Utilization of Alumina Industrial Waste in Production of Blended Cement.
Hagrass, A., Ibrahim, S., El-Hosiny, F., Youssef, S., Moharam, M. (2018). Utilization of Alumina Industrial Waste in Production of Blended Cement.. EKB Journal Management System, 107(1), 23-37. doi: 10.21608/tims.2018.198508
A. A. Hagrass; S. S. Ibrahim; F. I. El-Hosiny; S. I. Youssef; M. R. Moharam. "Utilization of Alumina Industrial Waste in Production of Blended Cement.". EKB Journal Management System, 107, 1, 2018, 23-37. doi: 10.21608/tims.2018.198508
Hagrass, A., Ibrahim, S., El-Hosiny, F., Youssef, S., Moharam, M. (2018). 'Utilization of Alumina Industrial Waste in Production of Blended Cement.', EKB Journal Management System, 107(1), pp. 23-37. doi: 10.21608/tims.2018.198508
Hagrass, A., Ibrahim, S., El-Hosiny, F., Youssef, S., Moharam, M. Utilization of Alumina Industrial Waste in Production of Blended Cement.. EKB Journal Management System, 2018; 107(1): 23-37. doi: 10.21608/tims.2018.198508

Utilization of Alumina Industrial Waste in Production of Blended Cement.

The Bulletin Tabbin Institute for Metallurgical Studies (TIMS)
Volume 107, Issue 1, 2018, Page 23-37  XML PDF (1.4 MB)
Document Type: Original research papers
DOI: 10.21608/tims.2018.198508
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Authors
A. A. Hagrass email 1; S. S. Ibrahim2; F. I. El-Hosiny3; S. I. Youssef1; M. R. Moharam4
1Tabbin Institute for Metallurgical Studies, Helwan, Cairo, Egypt.
2Central Metallurgical R&D Institute, Helwan, Cairo, Egypt.
3Faculty of Science, Ain Shams University, Cairo, Egypt.
4Faculty of Engineering, Al-Azhar University, Cairo, Egypt.
Abstract
In this study, blended cement pastes are made by different replacements of OPC by alumina (A) using standard water of consistency. The pastes were hydrated for various ages of hydration, up to 28 days. The mechanical and physico-chemical characteristics of the hardened cement pastes were studied and related to the structure of the hardened pastes and the rate of alumina replacement in the blended cement OPC-A pastes. The initial and final setting times of the blended cement pastes were reduced significantly when increasing the amount of partial substitution of alumina in OPC- A cement pastes. It was found that the optimum replacement of OPC by for the improvement of hydraulic properties of blended cement pastes is 5%. The replacement of alumina in mix A5 causes a marked improvement of the microstructure of pastes. The DSC thermograms and XRD analysis for investigated cement pastes indicated the formation of nearly amorphous calcium silicates hydrates, calcium sulphoaluminate hydrates, calcium aluminate hydrates and Portlandite. The SEM micrographs showed that the partial substitution of OPC by 5% alumina leads to more dense structure as compared to the neat OPC paste.
Keywords
Cement industry; industrial waste; alumina; setting time; compressive strengths; hydration kinetics
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